- Brand: Mercury
- Size: 100 115 HP
- Style: 4 Cylinder - Inline 4
- Condition: Used
- Notes: 1 YEAR WARRANTY
- SKU: 26-59593 CIG
- Manufacturer Part Number: 99021A6 43443A9 443314 5772A7 8M0230859
- Country of Manufacture: United States
- Motor & Engine Type: Mercury
- Part Type: Motors, Engines & Components
- Other Part Number: 8M0185146 815279A2
- Inventory Number: 26-59593 CIG
- Website Category: Ignition and Electrical Systems
- Website Sub Category: Switchboxes, Power Packs, CDI, EMM, CDM
- UPC: N/A
Part Numbers
Trigger: 99021A6
Ignition Mounting Plate: 443314
Switchbox: 5772A7
Ignition Coils: 8M0230859
Starter Solenoid: 8M0185146
Rectifier: 815279A2
Some part numbers listed above may be Mercury service replacement numbers and may not exactly match the numbers originally installed on the engine. Mercury frequently supersedes part numbers with updated service numbers that are fully compatible replacements.
Description
This listing is for an ignition and electrical component assembly removed from a Mercury outboard engine.
All components shown are included and will come exactly as pictured.
Condition
• Wires are not cut, burnt, or broken
• No visible damage
• System tested for good spark on the engine prior to removal
• Ready to install
• Normal cosmetic wear from previous use
Fitment
Mercury Inline 4-Cylinder Carbureted Outboards (99ci)
1988–1993
• 100 HP
• 115 HP
These engines utilize the ADI ignition system incorporating:
• Trigger 99021A6
• Switchbox 5772A7
• Rectifier 815279A2
Donor engine:
Model: 1100412BD
Serial: 0B329689
Engine: Mercury 100 HP Inline-4
Always verify compatibility using the exact part numbers and engine serial number before purchasing.
Warranty
All components in this ignition system are guaranteed for 1 year from the date of purchase through Southcentral Outboards.
If any individual component fails within this period, we will replace the faulty component. If a replacement is not available, a refund will be issued.
If you order this incorrectly or change your mind within 45 days, you may return it with a 20% restocking fee and shipping costs.
Disclaimer
We are using various web resources to cross-reference and describe our parts. These resources are not always 100% accurate, but accurate to the best of our knowledge.
Please verify fitment by model or serial number before purchasing. If you need help confirming compatibility, please contact us prior to purchasing and we would be happy to assist.

